Paste-applying mechanism for bag machines



March 19, 1935. G, w, PoPPE PASTE APPLYING MECHANISM FOR BAG MACHINES originl Filed sept. 30, 1952 5 Sheets-Sheet l l'mventor GEORGE W PoPPE (,ttomeg March 19, 1935. G. w. POPPE PASTE APPLYING MECHANISM FOR BAG MACHINES Original Filed Sept. 30, 1952 l. 5 Sheets-Sheet 2 Y. O .I 1 l Avv D n v 3 GEORGE W POPPE Gttorueg Mmh 19, 1935. G, W, POPE 1,994,666

PASTE APPLYING MECHANISM FOR BAG MACHINES Original Filed Sept. 50, 1952 3 Sheets-Sheet 3 /4 l l I l l I 4/ '0 'i 'g' ma', ./32 i '1, l

y Snnentor GEORGE W PoPPE Gtiorneg Patented Mar. 19, 1935 einer I PASTE-APPLYING MECHANISM FOR BAG MACHINES George W. Poppe, Brooklyn,

N. Y., assigner to Equitable Paper Bag C'o., Inc., Brooklyn, N. Y.

a corporation of New York Original `application September 30, 1932, Serial u No. 635,533. Divided and this application June 4 21, 1933, Serial No. 676,874. 1

2 Claims. (Cl. {J3- 18) This invention relates to a machine for mak-` ing bagsY and moreparticularly to the making of bagsk of relatively thin material. The improvements, however; are not limited to a machine for Vti handling 'thinv material but possess advantages for making bags of ordinary paper. l

'I'his application is a division of myapplication Serial No. 635,533, filed September 30, 1932. An object of the present invention is a better control of the application of the paste to the paper web prior to folding the sameinto a bag tube.

A feature of the invention relates to the construction and mode of operation of the paste applying disk whereby the paste is more evenly applied. V A further feature of .theinvention relates to the manner of rotating the paste applying disk and to the manner of adjustingthe same.

Other features apparent from the following description and claims when taken in connection with the following drawings in ,which- Figure 1 is a longitudinal section of a machine embodying my improvements;

Figure 2 is a plan and part sectional view on line 2 2, Figure 1;

' Figure 3 is a part sectional and part plan view of a portion of the rear of the machine substantially along the line 3 3, Figure 1;

Figure 4 is a detail of the shaft carrying the .bag

paste applying disk;

Figure 5 is a detail of a modified form of the paste-applying disk; Y

Figure 6 is a section and Figure 7 is a section on the line 7 7, Figure 3.

Referring to the drawings and more particularly to Figures 1 and 2 there is the usual supporting framework 2, the side members of which carry the various shafts for driving the usual mechanism of a bag machine, together with brackets for supporting the various auxiliary structures with which the present invention is more particularly concerned. t

Referring to Figure 2, the machine isdriven from a motor 4 whose shaft is provided with a pulley 5 about which passes a belt 6 to a pulley 7 on the shaft 8, which carries the lower pinch roller and from vwhich shaft most of the other parts receive their drive. On this shaft is also carried a sprocketY wheel over which passes a sprocket chain 10 connected to a sprocket 11 on shaft 12, Figures 2 and 3. A tension roller 13 is provided to keep the sprocket chain suii'iciently on the line 6 6, Figure 5;

and advantages will become.

taut. with a The shaft 12 carries a gear that meshes similar gear on stud shaft 14. 'I'he latter shaft carries a sprocket wheel for engagement with a sprocket chain 15 by which motion is transmitted to shaft 16.

.The paper or other material which is to form thebags is fed as a web 18 frorn'a roll 19 supported on a shaft 20 in the lower portion ,of the rear framework.V The web passes over guide rollers 22, 23 and 24 and around another roller 26 which reverses its direction of movement, the latter roller being carried by shaft 2'7.V The mechanism so far described is that which is found inan ordinary bag machine and is of well-known construction. In such machines, however, the roller 26 serves merely to reverse the direction of the web but is not itself positively driven. VIn the drawings illustrating the present improvements I have shown a construction `wherein the roller 26 is positivelydriven in timed relation with the feed rollers but this subject matter is not described in detail nor claimed herein butis `described and claimed in my divisional` application Serial No. ,676,871 led June 21, 1933, which is also a division of my application Serial-No. 635,533 above referred to. Insofar as the present invention is concerned, however, the roller 26 may or may not be positivelyV driven. y Y

The paper web after passing over the roller V26 is delivered to mechanism which folds it into the bag tube in the usual manner, such mechanism including a former plate 38, the right end of which, as indicated in Figure 1, is bent upwardly at about 45. The former is supported from a bridge 40 carried by arms 41 projecting forwardly, and upwardly. The web passes under the former and is folded over on to it .as illustrated in YFigureV 2. Projecting upwardly from theside plates 2 are four standards 42 which sup-v` port two plates `43, Figure 2, Vthe plates being separated sumciently' to permit the bagtube to freely movebetween them. Adjustment of the plates to and from each otheris effected byV slotting the plates as. shown in Figure 2 and providingset screws to hold them in the proper adjustment. ,These plates 43 support rollers which aid in giving the necessary control 'of the folded web. V

The folded tube passes to the feed rollers indicated at 44, the upper pair of which are mounted on shaft and the lower pair on shaft 46, these shafts extending into and being supported by the side frames of the machine. Preferably the upper rollers are provided with facings 44a of CFI rubber, leather or provide the desired surface friction. The lower other material such as will rollers are of steel without facings. the feed rollers there is provided a gear 48 on the shaft 8, VFigures 2 and 3, which gear meshes with an idler 50 which in turn mesheswith a gear 51 on the lower shaft 46. Near its other end but within gear 52 meshing with gear 53 on the upper shaft 45. The gears 52 and 53 are of the same size so that the feed rollers rotate in a 1 to l ratio.

After the web has been formed into a bag tube by being folded over the former andpasses between the feed rollers 44 it is severed into a bag length by mechanism including the so-called pinch bars and the striker bar. The pinch bars are also driven from the shaft 8 which has secured to it a pinion meshing with a pinion 56 on the upper shaft 54 which carries the pinch bar 47, the pinions 55 and 56 also driving in a 1 to 1 ratio.

After the severance of the bag tube it passes on to mechanism which closes the bag bottom and this mechanism is of the usual and well-known construction and consists of upper and lower cylinders carrying respectively a tucker blade and clamp. which cylinders are likewisey driven from the shaft 8. Y Y

The particular improvements described and claimed in the present application relate to the mechanism for applying paste to the web before itis foldedinto a tube. Ihave found as a matter of practical experience that there is difficulty in uniformly applying paste by the ordinary paste-applying roller when the web is of veryv thin material. Heretofore the paste-applying cylinder or disc has been supported for free rotation adjacent the roller 26 and was so positioned as to bear upon the paper in contact with the roller. I have found in actual practiceY that when such a paste applying mechanisin is used the pressure of the paste-applying disc'against the roller has resulted in a flattening of the edge of the disc leading to undesirable results. I have therefore overcome these diiculties by mounting the paste-applying roller somewhat lower down and arranging it so that it lightly presses against the paper web before the web encounters the Aroller 26. I also arrange to positively drive the disc in the YVsame direction as the paper web'is moving. The mechanism for this purpose consists in the following: v 'f Referring to Figure 1, I provide a pulley on shaft 46 about Vwhich passes a belt 132 which belt passes about a second pulley 134 carried by the shaft 135 which is connected to drive the paste-applying disc 136, Figure 3. The belt is held taut by an adjustable roller 137. Since the pulley 130 rotates in an anti-clockwise direction and it is desired to drive the shaft 135 ina clockwise direction the belt 132 is crossed as clearly indicated in Figure 1. The disc 136 dips into a paste-pot 138 having legs 139 extending, downwardly on either side of the machine, said legs pivotally engaging a rod 140 supported in arms 141 extending rearwardly from the side For driving the frame'2 the shaft 46 carries tion, A which is 90 a" web' o-fV paperA frames of the machine. An adjusting screw 142 bears against the underside of the paste-pot for giving to the disc the proper degree; of pressure against the paper web. The pasteapplyingdisc 136 is secured to a shaft 1441 which shaft' fo-r the purpose of enabling it to VbeK easily inserted into and removed fromits bearings-is made .as shown in Figure 4. As there shown the shaft has flatf tened portions 146 which fit into elongated Yopen-y ings in the bearingsV 147 and after the shaft has wise and a clamping collar 148 having 'a clamp- 10 been set into the openings itis moved lengthf `which it'hasbeen adjusted as `will be readily .l

understood from Figures 3 and 4. InFigure 3 the shaft 144 is shownas occupying normal posiportions 146. The upper at portion Figure 3 is of course under the collar 148 and is therefore shaftas shown in Figures s 150 Vwhich is eccentrically' placed and engages one of twopins 151 projecting .from1 aj collar 152 on the shaft 135.r By reason of-this'coupli'ngbefrom that shown in .Figure 4;,Y to more clearly indicatethe nature of the flat 20@ indicated by dotted lines. The upper eridfflftheV j 3jandz'4 carries a pin tween the shafts 135 Y.and 144the latter shaft may be readily removed.-

It is customary to have a scraping devieeizvhichr removes excess pastefrom'the discrfas litsedge emerges Vfrom the-paste. Such a' scraperzijs shown in Figure 3 vandfconsists of apiece of 'flat metal 154 suitably slotted and a screw 155-pr'ovidesv for the necessary adjustment'.

`Iniiigures 5jand 6":I'fhave shown' a slightly modified constructionfor mounting 'thefshaft 144. In this form of device in order tov-remove theshaft it is onlynecessary toturnthespringv pressedclips 156 and'lifththe shaft ourt'oftitsYY Y f vWhen rst threading the web f into theimachine it is desirable that it does j-not 'come 1in contact with the paste disc and to prevent this I provide a forked device indicatedat k153, Figure 3,

which engagesthe-web-I as shown-in Figure'land which device' maybe rotated about its pivot "159.

to hold the web free of the paste disc, the spring 160, Figure 3, supplying sufficient tension-5to frictionally hold 'the they are positively moved.

What I claim isz-'- tube forming mechanism and means for feeding a web of pape? to vsaid mechariism'.l o f 'avpasteapplying disc, a shaft upon ,whichfsaid discfis mounted, a'second shaft,l means for drivingithe same anda separable connection between said disc shaft and said second shaft. v

2. In a bag machine,thefcornbinatien'Witlivbagl and means for feeding' tube forming mechanism GEORGE` Perrin, L

forks in position to Y Y 1. In a bag machinethe combination with bag 

